Cooktop



FIG. 1 is an overhead frontal perspective view of the cooktop showing the new design;

FIG. 2 is a top plan view of the cooktop;

FIG. 3 is a right side elevational view of the cooktop;

FIG. 4 is a left side elevational view of the cooktop;

FIG. 5 is a rear elevational view of the cooktop; and,

FIG. 6 is a front elevational view of the cooktop.

The broken line showing of the unornamented bottom of the cooktop is for illustrative purposes only and forms no part of the claimed design; 

The ornamental design for a cooktop, as shown and described. 